I haven't heard the KT88 but the Gold Lion KT77 is to me by far the best current EL34 variant. By comparison a Psvane EL34 was unacceptably bright. Obviously KT88s are different tubes and YMMV.
You must have a verified phone number and physical address in order to post in the Audiogon Forums. Please return to Audiogon.com and complete this step. If you have any questions please contact Support.